jpeg core example, migrate to flake

Makefile

@@ -0,0 +1,22 @@
+JPEG_CORE_VVP := jpeg_core_tb.vvp
+INFILE        ?= test.jpg
+OUTFILE       ?= output.ppm
+VVP_FLAGS     ?=
+
+JPEG_CORE_DIR    := core_jpeg/src_v
+JPEG_CORE_SRCS   := $(wildcard $(JPEG_CORE_DIR)/*.v)
+JPEG_CORE_TB     := jpeg_core_tb.v
+
+.PHONY: all sim clean
+
+all: $(JPEG_CORE_VVP)
+
+$(JPEG_CORE_VVP): $(JPEG_CORE_TB) $(JPEG_CORE_SRCS)
+	iverilog -g2005 -Wall -o $@ $^
+
+# Run simulation
+sim: $(JPEG_CORE_VVP)
+	vvp $< $(VVP_FLAGS) +infile=$(INFILE) +outfile=$(OUTFILE)
+
+clean:
+	rm -f $(JPEG_CORE_VVP) $(OUTFILE) *.vcd